Low-frequency noise reduction enhanced silencing device and sound barrier with silencing structure

• Main Authors: LI JIE, YUAN MINMIN, ZU YAQUN, WEI XIANWEI, SHANG XIAODONG
• Format: Patent
• Language: Chinese; English
• Published: 18.10.2022
• Subjects: ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTIONOF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, ORTHE LIKE; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; FIXED CONSTRUCTIONS

The invention provides a low-frequency noise-reduction enhanced silencing device, which comprises a sound absorption cavity, a noise reduction cavity, a noise reduction cavity, a noise reduction cavity, a noise reduction cavity and a noise reduction cavity, wherein the sound absorption cavity is provided with a first opening; the silencing structure is installed in the sound absorption cavity and comprises a spiral silencing plate, one end of the spiral silencing plate is an expansion end, the other end of the spiral silencing plate is a contraction end, and the radius of the spiral silencing plate is gradually reduced from the expansion end to the contraction end; a sealing baffle is arranged on the periphery of the spiral silencing plate, the spiral silencing plate is sealed and blocked in the silencing cavity through the sealing baffle, and a through hole is formed in the sealing baffle; a second opening is formed in the position, close to the expansion end, of the silencing cavity. According to the low-fr